RIP Version 1 - Routing Protocols and Concepts - page 216

Task 1: Make Changes Between Scenario B and Scenario C

Remove network 192.168.4.0 from the RIP configuration for R2. Step 1.

Remove network 192.168.4.0 because no updates will be sent between R2 and R3, and
you don't want to advertise the 192.168.4.0 network to R1:

R2(config)# router rip
R2(config-router)# no network 192.168.4.0

Remove RIP routing from R3. Step 2.

R3(config)# no router rip

Task 2: Configure the Static Route on R3 for the 172.30.0.0/16 Network
Because R3 and R2 are not exchanging RIP updates, you need to configure a static route on R3 for
the 172.30.0.0/16 network:
R3(config)# ip route 172.30.0.0 255.255.0.0 serial0/0/1

This will send all 172.30.0.0/16 traffic to R2.

Task 3: Configure a Default Static Route on R2

Configure R2 to send default traffic to R3. Step 1.

Configure a default static route on R2 that will send all default traffic—packets with desti-
nation IP addresses that do not match a specific route in the routing table—to R3:

R2(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0/1

Configure R2 to send default static route information to R1. Step 2.

The default-information originate command is used to configure R2 to include the
default static route with its RIP updates. Configure this command on R2 so that the default
static route information is sent to R1:

R2(config)# router rip
R2(config-router)# default-information originate
R2(config-router)#

Note: Sometimes it is necessary to clear the RIP routing process before the default-information originate com-
mand will work. First, try the clear ip route * command on both R1 and R2. This command will cause the routers
to immediately flush routes in the routing table and request updates from each other. Sometimes this does not
work with RIP. If the default route information is still not sent to R1, save the configuration on R1 and R2 and
then reload both routers. Doing this will reset the hardware, and both routers will restart the RIP routing process.

Task 4: Verify RIP Routing

Use the show ip route command to view the routing table on R2 and R1. Step 1.

R2# show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2